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G. A. MASON.

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GEORGE A. MASON, or CHELSEA, MASSACHUSETTS.

Lam Patent No. 79,369, dated June so, 1868.

IMPROVEMENT IN LAMP-BURNERS.

TO ALL WHOM IT MAY CONCERN: 4

Be it known that I,-GEORGE A. MssoN, of Chelsea, in the county of $ufiolk, and State of Massachusetts, have invented certain new and useful Improvements in Lamp-Tops; and I do hereby declare that the following isa full, clear, and exactdescription of the same, reference being bad to the accompanying drawings, forming part of this specification, in which- I Figure is avertical central section of a lamp-top taken on the plane of the line a: z, fig. 2, showing my improvements.

Figure 2 is a transverse section taken on the plane of the line y y, fig. 1. Similar letters of reference indicate like parts in both figures.

My invention consists in the arrangement, in a lamp-burner, of 'a circular chimney-supporting spring, whereby the same is less liable to heat suddenly and thereby cause the chimney to break, by reason of a too sudden expansion thereof at the points where the spring comes in contact with it. It also consists in 'a guiding-piece and socket 'in combination with the base or bottom portion of the burner, and the screw-piece, whereby the wicktube can be inserted readilyin place without bringing the wick in contact with any part of the burner.

A designates the base or perforated bottom plate of the lamp-top, having its edge turned up vertically, as

shown at b, fig. 1, to form a flange or flanges for holding the lower edge of the chimney securely against lateral displacement.

B is the wick-tube, and-C the cone or deflector. The said cone or deflector is supported by arms, a a,

secured to a socket, D, which latter is secured to the base, A, so as to surround the lower part of the wick-tube when inserted in the burner, as shown clearly in fig. 1.

I is a circular rim or ring provided with springs c c, This ring is secured to the arms a a in such manner that a space or-throat, d, (see fig. 1,) shall 'be left between it and the cone or deflector, its springs c a being arranged around it so as to bear against the inner surface of the chimney, as shown in fig. 1, and steady the seine. One great object gained by this arrangement of the spring-carrying ring is that it does not get heated quickly. To explain, it the springs were directly attached to or constructed so as to form part of the cone or deflector, they would become suddenly heated, and, by reason of their contact with the chimney, the latter would expand so suddenly at or near this point of contact as to break.

The wick-tube is secured to a piece,f, which is fitted to screw into the collar of the lamp; and to this screw-piecef, I secure a guide-piece, G, which surrounds the lower part of the wick-tube, and which is of a size to fit into the socket D; and to enable a more accurate insertion of said guide-piece G into the socket D, the former has arib, g, formed upon each side, which slides in a groove, 7t, formed in the latter, as will be readily understood by reference to figs. 1 and 2. By this construction the wick tube is steadiedwhile it"is being insertedin place, and therefore the wick is not displaced by coming in contact with anypart of the burner a contingency often occurring with these parts when constructed separately, and always attended by the wick smoking.

I will here remark that I am aware of a patent granted to MIH. Collins, on the 19th day of September,

1865,,in wlrich a deflector is shown, having-its edges slitted,so that when the chimney is placed around the same,

the divided portions will bear against the inner surfaceof said chimney and hold the same steadily. The objection to such device is that the deflector becomes very hot in every short time, and long before the glass; hence, its hot edges bearing against the cold glass, the latter does not have sufficient time for expansion, and therefore breaks; but with the springs arranged as I have shown them, they do not become more quickly heated than the chimney, and hence a great destructionof chimneys, is. prevented by the use 'of my'invcntio n. I will also remark that I have seen in the market a lamptop of a Mr. Atwood, which shows a coiled spring secured to the edge of the deflector; but so far as I am aware, no lamp-top of the character herein alluded to can be found but that has the chimney-sustaining spring directly attached to the cone ordefiector, whereas with my invention, as before stated, the chimney-sustaining spring is separate and distinct from the cone or deflector, and will not, therefore, become so much heated as to crack the chimney before the latter has ample time for expansion.

What I claim as my invention, and desire to secure by Letters Patent, ise 1. The arrangement of a. chimney-sustaining spring intermediately between the defiectqror cone 0 and the base, A, of thelamptop, substantially as and for the purpese set forth.

2. In a burner having an elevated deflecter, I claim the guide-piece G and socket D, in combination with the base-plate, A, and wick-tube B,'when said guide-piece and socket are constructed as and for the purpose herein specified.

G. A. MASON.

Witnesses:

M. LWmesToN;

J'omz R. COOPER. 

